Preface: I saw this in actual theatre so I am aware that that enhanced some of my experience for sound and looks.
Overall, this movie is very much an "anime movie". It has the predictable anime superhero plot line with some minor twists that allow for a thorough enjoyment of the plot overall.
A key thing I greatly enjoyed was the All Might short it started out with that kind of opened up the character of All Might to the viewers in a way we hadn't particularly seen. This then, obviously, fed later in to the movie when we got to meet other big All Might fans that had actually known him in his other ages, contrasting to young Midoriya who just idolised him and his past, despite not really being there for it.
The characters that were movie exclusive were also compelling ranging from the powered villian who basely sought out more power for his employer and himself to the young, powerless girl All Might had known since her younger days.
These compelling characters combined with a signature MHA soundtrack allowed for a great overall experience that, like with most shonen, was cookie cutter yet used its IP to try and stand out as its own well-developed film.